/Engine/Source/Runtime/MovieScene/Public/EntitySystem/MovieSceneEntityLedger.h
Check whether any of the entities in this ledger or their children match the specified filter
bool Contains ( [UMovieSceneEntitySystemLinker](API\Runtime\MovieScene\EntitySystem\UMovieSceneEntitySystemLinker) * Linker, const [FEntityComponentFilter](API\Runtime\MovieScene\EntitySystem\FEntityComponentFilter) & Filter ) const